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This directory contains code, tools and data for the AOSP reference location
time zone provider. Location time zone providers are used for location-based
time zone detection on Android. See Android's
android.service.timezone.TimeZoneProviderService class for more details.
Directory structure
===================
`apex`
- Files associated with a proposed mainline module APEX to hold the AOSP
reference location time zone provider.
`common`
- Utility code shared between several subdirectories.
`data_pipeline`
- Code for a host sample / reference data generation pipeline. See
`run-data-pipeline.sh` below.
`geotz_lookup`
- A high-level API for performing time zone ID lookups for a location using
the `tzs2.dat` file. Supports host and device usage.
`locationtzprovider`
- A reference location time zone provider that uses AOSP APIs to obtain
location and the `geotz_lookup` APIs to obtain the time zone IDs to pass to
the platform.
`output_data`
- Holds the `tzs2.dat` file generated by `run-data-pipeline.sh` along with
the associated license files.
`s2storage`
- Generic file reading / writing code and tools to support `tzs2.dat`
generation on host, and the file's use on host and device. See
`s2storage/README.md` for details.
`tzs2storage`
- TZ-specific file reading / writing code and tools to support `tzs2.dat`
generation on host, and the file's use on host and device. See
`tzs2storage/README.md` for details.
`tzbb_data`
- Data / licenses from the external
[timezone-boundary-builder](https://github.com/evansiroky/timezone-boundary-builder)
project. Used as input for the reference data generation pipeline.
`validation`
- Tooling to help validate the `tzs2.dat` file against other data sources.
Data file update tools
======================
`download-tzbb-files.sh`
- Used to refresh the data in `tzbb_data/` from the
[timezone-boundary-builder](https://github.com/evansiroky/timezone-boundary-builder)
project.
`run-data-pipeline.sh`
- Runs the `data_pipeline` data generation pipeline. It takes data from
`tzbb_data/`, processes it, and puts the resulting `tzs2.dat` file in
`output_data/`.
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